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參數(shù)資料
| 型號(hào)： | AD8013 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Single Supply Low Power,Triple Video Amplifier(單電源,低功耗,三通道視頻放大器) |
| 中文描述： | 單電源低功耗，三路視頻放大器（單電源，低功耗，三通道視頻放大器） |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 256K |
| 代理商： | AD8013 |
AD8013
REV. A
–10–
4
+V
S
AD8013
1.0μF
0.1μF
11
1.0μF
0.1μF
–V
S
R
G
R
T
V
IN
15
C
L
V
O
R
F
R
S
Figure 28. Circuit for Driving a Capacitive Load
T able II. Recommended Feedback and Series Resistors vs.
Capacitive Load and Gain
R
S
– Ohms
G = 2
25
25
20
15
15
15
C
L
– pF
20
50
100
200
300
≥
500
R
F
– Ohms
2k
2k
3k
4k
6k
7k
G
≥
3
15
15
15
15
15
15
10
0%
100
90
50ns
500mV
1V
V
IN
V
OUT
Figure 29. Pulse Response Driving a Large Load Capacitor.
C
L
= 300 pF, G = +2, R
F
= 6k, R
S
= 15
Overload Recovery
T he three important overload conditions are: input common-
mode voltage overdrive, output voltage overdrive, and input
current overdrive. When configured for a low closed-loop gain,
the amplifier will quickly recover from an input common-
mode voltage overdrive; typically in under 25 ns. When con-
figured for a higher gain, and overloaded at the output, the
recovery time will also be short. For example, in a gain of +10,
with 15% overdrive, the recovery time of the AD8013 is about
20 ns (see Figure 30). For higher overdrive, the response is
somewhat slower. For 6 dB overdrive, (in a gain of +10), the
recovery time is about 65 ns.
10
0%
100
90
50ns
500mV
5V
V
IN
V
OUT
Figure 30. 15% Overload Recovery, G = +10 (R
F
= 300
,
R
L
= 1 k
, V
S
=
±
5 V)
As noted in the warning under “Maximum Power Dissipation,”
a high level of input overdrive in a high noninverting gain circuit
can result in a large current flow in the input stage. T hough this
current is internally limited to about 30 mA, its effect on the
total power dissipation may be significant.
High Performance Video Line Driver
At a gain of +2, the AD8013 makes an excellent driver for a
back terminated 75
video line (Figures 31, 32, and 33). Low
differential gain and phase errors and wide 0.1 dB bandwidth
can be realized. T he low gain and group delay matching errors
ensure excellent performance in RGB systems. Figures 34 and
35 show the worst case matching.
75
75
V
OUT
75
CABLE
75
75
CABLE
4
+V
S
AD8013
0.1μF
11
0.1μF
–V
S
R
G
V
IN
R
F
Figure 31. A Video Line Driver Operating at a Gain of +2
(R
F
= R
G
from Table I)
FREQUENCY – Hz
1M
1G
10M
C
(
100M
–6
+1
0
–1
–2
–3
–4
–5
0
–90
–180
–270
P
G = +2
R
L
= 150
V
S
=
±
5V
V
S
= +5V
V
S
= +5V
V
S
=
±
5V
GAIN
PHASE
Figure 32. Closed-Loop Gain & Phase vs. Frequency
for the Line Driver
FREQUENCY – Hz
1M
1G
10M
N
100M
+0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
G = +2
R
L
= 150
V
S
= +5V
V
S
=
±
5V
+0.2
Figure 33. Fine-Scale Gain Flatness vs. Frequency,
G = +2, R
L
= 150
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